TY  - RPRT
TI  - Distribution of minor elements in ore and host rock, Illinois-Kentucky fluorite district and Upper Mississippi Valley zinc-lead district
AU  - Wayne E. Hall
AU  - Allen V. Heyl
PY  - 1968
DO  - 10.2113/gsecongeo.63.6.655
UR  - https://pubs.usgs.gov/publication/70209022
ID  - 70209022
ER  -